Cable and brake-drum construction



June 3, 1930. E. E. GREVE 1,761,827

CABLE AND BRAKE DRUM CONSTRUCTION Filed Feb 27, 1928 I I| I IIDII Ill g. I I

j IJJI-||I l I II II 711! i In INVENTOR I V 25 plication ofmy invention;

:, :Pat ente cl June 3, 1930 j s SKATE.

FATE.

V EDGAR 'E. v ennvn, oF Bn'LLEvuE, rnnnsytvanra, ASSIGNOR To OIL W LL 'sn'rrtx coll/trawler PITTSBURGH,PENNSYLVANIA, A CORPORATION or PENNSYLVANIA:

CABLE AND'BRAKE-DRUM cons'rauorrron j Applicationfiled February 27, 1928. Serial NOHQSVASSJ I -My' invention relates to a new and improved cable and brake-drum construction of the character used in rotary hoists or dra wsworks employed in connection with 5 rotary drilling rigs, and usually designated as, the brake flange of the drum.

ln; the employment of the drums ofthe usual construction, considerable trouble has been encountered due to heat generated by friction; between the brake-bands or brakelining and the cable-drum flanges or the brake-drums thereof.

. Qne of; the primeobjects of the present invention is to provide construction that will prevent; thisover heating of the parts mention'ed. Another object of the present invention is to provide a simple, strong and durable air-cooled drum ,construction.

Otherobjects and advantages of my in- .aZQVBIlfQiOJl will be pointed out or become ap- Pa-r nt from a consideration of; the specification taken 'in connect on with the accompany g d awings: l

Inthe drawings, which. illustrate an ap- Fig. 1. is an end elevational view of a drum structure embodying my invention; 7 V 1 Fig. 2, a part elevational and a part sectional View, the section being taken on line II.II of Fig. 1; and I i Fig. 3, a fragmentary diagrammatic view illustratingthe, travel of air currents into and fromthe drum.

I ferred, the drum construction comprises the cable-drum portion proper, designated generall-y by the numeral 5', and includesa hollow spoolsp'ortion "6 terminating in spacedapartflanges 7 hub members 8 each formed with a radiatingfcurved plate-like member 9 extending from the hub, and merging into theflange 7, said member 9 being formed withanfannularflange '10. Each of the hubs is formed with a key-Way 11 adapted to receive a key 12 for securing the hubs to a shaft 13. V 1

' The brake-drum orbrake-flange 14, as illustrated, is made as a separate member, and is designedto be attached to the flanges ec 7 of the cable-drum by means of a series of R ferring'to-the1drawings and aspreheaded bolts 15 passed through openings 2 formed in the brake-drum and in theflanges 7 of the cable-drum. The brake-drum 14 is formed with an annular flange 16,;andwhen positioned upon the cable-drum, said flange 16 cooperates with the flange Tof the drum for maintaining a brake band or brake-lin 111g upon the braking surface 17 of the said brake-drum.

Drum 14 is in the form of a l' ollow cylinapproximately degrees to the axis. These blades or vanes' 20 constitute the outer series of blades or vanes employed in the air-cooled construction embodied in my invention; The sald blades may beformed integrally with the interior of the brake-drum or beiwelded thereto as desired. Said blades '20 aredeq signedto cooperate with another'series of blades or vanes enteringinto the construction of the cooling means. 7 V

. The second series of blades abovereferred to are arranged on a conical ring-shaped member 23 adapted to bearranged concentrically of the brake drum and be securely attachedto the inclined portions 22 of the vanes '20. of the brake-drum. As shown, the bladesor vanes 24 carried by the conical ring comprise a portion 25 disposedparallel to the axis of the drum and a portion 26 inclined at approximately degrees to the inclination of portions 22 of vanes 20. Vanes 24 are adapted tobe secured to the curved surface of plate portion 9 of the drum by welding or soldering the inner edges thereto. f

V Referring'nowto Figs. 1 and 3, and assumingcounter-clockwise rotation, it will be understood that the inclined faces or portions 26 of vanes 24 will function to draw air into the interior of the brake-drum or a e, an tha thi nd awn ai W l be face 17015 the brake-drum, the heat generhub structure, thus guiding the air and passing it radially and outwardly from the brake-drum, the curvature of the surface9 being uch-as to permit a uniform flow ofair v outwardly."

ring member 23 at the inner inclined edges oflthe inclined portion of the blades or vanes 20,t he air drawn into the structure will be passed into contact'with the interior curved surface of wall 19 ofthe brake-drum, disposed adjacent theqbraking surface l'? and, in its passageoutof the device,'will This I outwardpas'sageis aided by a vacuum c'r'ea ated on the under surfaces of inclined pori p 7 p I h,

' cluding a1cable-drummemberhaving'a h01 c low. spool portion, ahub,aside flange,fxahd g a I curved plate-likey-member extending radi 1- ally from the hub and-merging intoithe" y Vflange,'a;brake-drumpositionedon the cable-i drum and having an interior curvedportion I forming a continuation of thef'curvedi'plate cool the. brake contacting surface.

tions22 of-vanesQO. I r c It will, of course, be understood that when a braking force is applied to the brake surated is conducted by the metal of said brakefiange or drum to the curved surface 19 thereoffand that the outward passage ofair along thecurved surface produces heat trans-f 7 I fer by convexion," and that the heat ispa ssed p V v I drum agalnst said-curved surfacesand pass-j outwardly with the air currents.

- of the brake As particularly shown 7 Fig. 3, after'the air enters the interior. of the brake-drum or flange,'its direction is reversed and the air discharged 'through th'e outer vsetor series of 'vanes carriecl by the brake-drum, thus producing a continuous circulation of a .cooling'medium against and adjacent to the brake-band bearing surface drum'.." P

"lclaimz' Z p l 1. A drum of the characterdescribed including a cable druni member, a brake-drum member,and air cooling means carriedthereby includingan inner anda'n outerset of concentrically arranged blades and curved walls, the latter respectively carried by the cable and brake drum members and co-acting with the blades to efiect a circulation of air within'the drum. i r

7' 2. A drum of the character described including a cable-drum member, a'brake drum member, andair cooling means carried there:

by, saidjjcooling means including an {outer and an inner 'set of concentrically arranged of the drum and portionsinclined to thesaid axis. 3. A drum 'offthe character; described including a cable-drum member-having a hub formed with a curved plateextension, a

, brake-band-bearing ofth e brake-drum mem- Owing to the termination of the conical? V ymember positioned on and secured to the 7 cable-drum member, and air .cooling means by th arrows in *ing the air currents fromthe'drum in conrents on to the curved'plate andcpassythe currents from the plate incontact' with the her; I

cluding a cable-drum member, a brake-drum carried thereby, said "cooling means. includdrum member andisaid inner set being carllGCl on a ring member secured'to-the blades 1 of-the brake-drum; T

5-; A drum of the characterdescribedin member, and varies within the brake-Idrunr for drawing alr currents into the braketact wit lithe brakehand bearing of the brake-drum. c .7 I V drum of the character; describedin 6'- Adrum' ofthe character described'inblades and curved walls, the latterrespec'-' tively ca'rriedby the cable drum'member and the jbrake-drum membe'r, whereby air cur-Q 0s rents are drawn into the drumanddischarge adjacent the brake-band'bearing.

- '7. A drum'of the character described'including'a' cable-drum member,1. a brake-drum member, and air cooling means for-effecting cooling of the parts adjacent the brake-band bearing of thebrake-drum member 'includ ing two sets of concentrically, arranged parallel with the axis of the drum and portions inclined to the said "aXis.-,-:

hollow, cylindrical brake-drum member positioned on and secured to the cable-drum and an inner set of concentrically arranged vanes or blades, said outer set of blades be- 'bladesandcurved walls',"theflat,ter, re'spec5 tively carriedfby the cable-drum member and the brake drum member, whereby air "currents are 'drawninto the drumfandg-d'iss charge adjacent the brake-band'bearing, the a blades of each sethaving portionsi disposed V p V lIntestimonyijwheleof'I aflix mysignature; I 

